using System; using System.Windows; using System.Windows.Interop; namespace Wpftest { public partial class MainWindow : Window { public MainWindow() { this.InitializeComponent(); // 在此点下面插入创建对象所需的代码。 } protected override void OnSourceInitialized(EventArgs e) { base.OnSourceInitialized(e); HwndSource hwndSource = PresentationSource.FromVisual(this) as HwndSource; if (hwndSource != null) { hwndSource.AddHook(new HwndSourceHook(this.WndProc)); } } private const int WM_NCHITTEST = 0x0084; private readonly int agWidth = 12; //拐角宽度 private readonly int bThickness = 4; // 边框宽度 private Point mousePoint = new Point(); //鼠标坐标 public enum HitTest : int { HTERROR = -2, HTTRANSPARENT = -1, HTNOWHERE = 0, HTCLIENT = 1, HTCAPTION = 2, HTSYSMENU = 3, HTGROWBOX = 4, HTSIZE = HTGROWBOX, HTMENU = 5, HTHSCROLL = 6, HTVSCROLL = 7, HTMINBUTTON = 8, HTMAXBUTTON = 9, HTLEFT = 10, HTRIGHT = 11, HTTOP = 12, HTTOPLEFT = 13, HTTOPRIGHT = 14, HTBOTTOM = 15, HTBOTTOMLEFT = 16, HTBOTTOMRIGHT = 17, HTBORDER = 18, HTREDUCE = HTMINBUTTON, HTZOOM = HTMAXBUTTON, HTSIZEFIRST = HTLEFT, HTSIZELAST = HTBOTTOMRIGHT, HTOBJECT = 19, HTCLOSE = 20, HTHELP = 21, } protected virtual IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) { switch (msg) { case WM_NCHITTEST: { this.mousePoint.X = (lParam.ToInt32() & 0xFFFF); this.mousePoint.Y = (lParam.ToInt32() >> 16); //告诉系统你已经处理过该消息,不然设置为false handled = true; #region 测试鼠标位置 // 窗口左上角 if (this.mousePoint.Y - this.Top <= this.agWidth && this.mousePoint.X - this.Left <= this.agWidth) { return new IntPtr((int)HitTest.HTTOPLEFT); } // 窗口左下角 else if (this.ActualHeight + this.Top - this.mousePoint.Y <= this.agWidth && this.mousePoint.X - this.Left <= this.agWidth) { return new IntPtr((int)HitTest.HTBOTTOMLEFT); } // 窗口右上角 else if (this.mousePoint.Y - this.Top <= this.agWidth && this.ActualWidth + this.Left - this.mousePoint.X <= this.agWidth) { return new IntPtr((int)HitTest.HTTOPRIGHT); } // 窗口右下角 else if (this.ActualWidth + this.Left - this.mousePoint.X <= this.agWidth && this.ActualHeight + this.Top - this.mousePoint.Y <= this.agWidth) { return new IntPtr((int)HitTest.HTBOTTOMRIGHT); } // 窗口左侧 else if (this.mousePoint.X - this.Left <= this.bThickness) { return new IntPtr((int)HitTest.HTLEFT); } // 窗口右侧 else if (this.ActualWidth + this.Left - this.mousePoint.X <= this.bThickness) { return new IntPtr((int)HitTest.HTRIGHT); } // 窗口上方 else if (this.mousePoint.Y - this.Top <= this.bThickness) { return new IntPtr((int)HitTest.HTTOP); } // 窗口下方 else if (this.ActualHeight + this.Top - this.mousePoint.Y <= this.bThickness) { return new IntPtr((int)HitTest.HTBOTTOM); } else // 窗口移动(也可在窗体MouseLeftButtonDown事件中调用DragMove()方法),双击最大化,所有剩余鼠标操作映射到标题栏 { return new IntPtr((int)HitTest.HTCAPTION); } #endregion } } return IntPtr.Zero; } } }
弊端 窗体 中控件 事件 失效